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Finding the Fourth Proportional to 99,395.76, 137,094.48 and 56,938.80

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Solution

The fourth proportional to 99,395.76, 137,094.48 and 56,938.80 is: 78,534.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,395.76 : 137,094.48 = 56,938.80 : x
  2. Step 2: Convert to fraction form
    99,395.76/137,094.48 = 56,938.80/x
  3. Step 3: Cross multiply
    99,395.76x = 137,094.48 × 56,938.80
  4. Step 4: Simplify right side
    99,395.76x = 7,805,995,177.82
  5. Step 5: Solve for x
    x = 7,805,995,177.82/99,395.76
  6. Step 6: Final answer
    x = 78,534.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.